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Finding the Fourth Proportional to 68,648.39, 103,130.12 and 48,707.06

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Solution

The fourth proportional to 68,648.39, 103,130.12 and 48,707.06 is: 73,172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,648.39 : 103,130.12 = 48,707.06 : x
  2. Step 2: Convert to fraction form
    68,648.39/103,130.12 = 48,707.06/x
  3. Step 3: Cross multiply
    68,648.39x = 103,130.12 × 48,707.06
  4. Step 4: Simplify right side
    68,648.39x = 5,023,164,183.46
  5. Step 5: Solve for x
    x = 5,023,164,183.46/68,648.39
  6. Step 6: Final answer
    x = 73,172.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.